src/gallium/auxiliary/vl/vl_vertex_buffers.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 Christian König
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27 #ifndef vl_vertex_buffers_h
  28 #define vl_vertex_buffers_h
  29
  30 #include <assert.h>
  31 #include <pipe/p_state.h>
  32 #include "vl_types.h"
  33
  34 struct vl_vertex_buffer
  35 {
  36    unsigned num_verts;
  37    unsigned stride;
  38    struct pipe_resource *resource;
  39    struct pipe_transfer *transfer;
  40    void *vectors;
  41 };
  42
  43 struct pipe_vertex_buffer vl_vb_upload_quads(struct pipe_context *pipe, unsigned max_blocks);
  44
  45 struct pipe_vertex_element vl_vb_get_quad_vertex_element(void);
  46
  47 unsigned vl_vb_element_helper(struct pipe_vertex_element* elements, unsigned num_elements,
  48                               unsigned vertex_buffer_index);
  49
  50 struct pipe_vertex_buffer vl_vb_init(struct vl_vertex_buffer *buffer,
  51                                      struct pipe_context *pipe,
  52                                      unsigned max_blocks, unsigned stride);
  53
  54 void vl_vb_map(struct vl_vertex_buffer *buffer, struct pipe_context *pipe);
  55
  56 static inline void
  57 vl_vb_add_block(struct vl_vertex_buffer *buffer, void *elements)
  58 {
  59    void *pos;
  60    unsigned i;
  61
  62    assert(buffer);
  63
  64    pos = buffer->vectors + buffer->num_verts * buffer->stride;
  65    for(i = 0; i < 4; ++i) {
  66       memcpy(pos, elements, buffer->stride);
  67       pos += buffer->stride;
  68       buffer->num_verts++;
  69    }
  70 }
  71
  72 void vl_vb_unmap(struct vl_vertex_buffer *buffer, struct pipe_context *pipe);
  73
  74 unsigned vl_vb_restart(struct vl_vertex_buffer *buffer);
  75
  76 void vl_vb_cleanup(struct vl_vertex_buffer *buffer);
  77
  78 #endif